Ptfe is a thermoplastic with high thermal characteristics. It undergoes a decrease in hardness only around + 300 ° C. However, it is recommended to use it at temperatures that do not exceed + 260 ° C. The chemical properties are also excellent: it is attacked only by alkaline metals (eg sodium, potassium) in the molten state and from fluorine in the gaseous state. Acids, alkalis and solvents of any kind do not affect ptfe. It is an excellent insulating material and the electrical and dielectric properties are particularly favorable. The ptfe deforms under load, but tends to summarize the primitive form if, after removing the load, the temperature increases. It has a very low static and dynamic friction coefficient. Moisture absorption is almost nil. It is suitable for: seals, rings, stuffing boxes, valve balls, expansion joints for pipes, protective coatings, insulators, bushings, piston rings and piston seals, etc …
